Characteristics of spherical-shaped Li4Ti5O12 anode powders prepared by spray pyrolysis

Seo Hee Ju, Yun Chan Kang

Research output: Contribution to journalArticle

44 Citations (Scopus)

Abstract

Spherical-shaped Li4Ti5O12 anode powders with a mean size of 1.5 μm were prepared by spray pyrolysis. The precursor powders obtained by spray pyrolysis had no peaks of crystal structure of Li4Ti5O12. The powders post-treated at temperatures of 800 and 900 °C had the single phase of spinel Li4Ti5O12. The powders post-treated at a temperature of 1000 °C had main peaks of the Li4Ti5O12 phase and small impurity peaks of Li2Ti3O7. The spherical shape of the precursor powders was maintained after post-treatment at temperatures below 800 °C. The Brunauer-Emmett-Teller (BET) surface areas of the Li4Ti5O12 anode powders post-treated at temperatures of 700, 800 and 900 °C were 4.9, 1.6 and 1.5 m2/g, respectively. The initial discharge capacities of Li4Ti5O12 powders were changed from 108 to 175 mAh/g when the post-treatment temperatures were changed from 700 to 1000 °C. The maximum initial discharge capacity of the Li4Ti5O12 powders was obtained at a post-treatment temperature of 800 °C, which had good cycle properties below current densities of 0.7 C.

Original languageEnglish
Pages (from-to)40-44
Number of pages5
JournalJournal of Physics and Chemistry of Solids
Volume70
Issue number1
DOIs
Publication statusPublished - 2009 Jan
Externally publishedYes

Keywords

  • A. Ceramics
  • A. Electronic materials
  • B. Chemical synthesis
  • D. Electrochemical properties

ASJC Scopus subject areas

  • Chemistry(all)
  • Materials Science(all)
  • Condensed Matter Physics

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